Projection Line Intersection Demo

This example demonstrates calculating the intersection point of two lines using projection lines. Core mathematical concepts include vectors, projection, and coordinate geometry. Construction highlights the use of GeoGebra commands and objects such as Vector, objects A and B, vectors u and v, unit vectors uunit and vunit, projection vectors prju1 and prjvecB. Suitable for high school and above students to learn about vector projection and applications of coordinate geometry.